<template>
  <div>
    <div class="search">
      <input v-model="keyWord"
      class="search-input"
      placeholder="输入城市名或拼音" />
    </div>
    <div class="search-content"
    ref="search"
    v-show="keyWord"
    >
      <ul>
        <li class="search-item border-bottom"
        v-for="item of list"
        :key="item.id"
        @click="handleCityClick(item.name)"
        >
        {{item.name}}
        </li>
        <li class="search-item border-bottom"
        v-show="hasNoData"
        >
        没有找到匹配项
        </li>
      </ul>
    </div>
  </div>
</template>
<script>
import BScroll from 'better-scroll'
import {mapMutations} from 'vuex'
export default {
  name: 'CityHeader',
  props: {
    cities: Object
  },
  data () {
    return {
      keyWord: '',
      list: [],
      timer: null
    }
  },
  methods: {
    ...mapMutations(['changeCity']),
    handleCityClick (city) {
      this.changeCity(city)
      this.$router.push('/')
    }
  },
  computed: {
    hasNoData () {
      return !this.list.length
    }
  },
  watch: {
    keyWord () {
      if (this.timer) {
        clearTimeout(this.timer)
      }
      if (!this.keyWord) {
        this.list = []
        return
      }
      this.timer = setTimeout(() => {
        const result = []
        for (var i in this.cities) {
          this.cities[i].forEach((value) => {
            if (value.spell.indexOf(this.keyWord) !== -1 ||
            value.name.indexOf(this.keyWord) !== -1) {
              result.push(value)
            }
          })
        }
        this.list = result
      }, 100)
    }
  },
  mounted () {
    this.scroll = new BScroll(this.$refs.search)
  }
}
</script>
<style lang="stylus" scoped>
  @import '~styles/varibles.styl'
  .search
      height: .72rem
      padding: 0 .1rem
      background: $bgColor
      .search-input
          box-sizing: border-box
          width: 100%
          height: .62rem
          padding: 0 .1rem
          line-height: .62rem
          border-radius: .06rem
          text-align: center
          color: #666
  .search-content
    overflow: hidden
    position: absolute
    top: 1.58rem
    left: 0
    right: 0
    bottom: 0
    z-index: 1
    .search-item
      line-height: .62rem
      padding-left: .2rem
      background: #ffffff
      color: #666
</style>
